How to check if Uploaded 7zip File is Encrypted in ServiceNow

[bhushannerkar]

Hello Everyone,

I need to implement a backend validation in ServiceNow to check if an uploaded 7zip (.7z) file is password-protected or encrypted. The requirement is:

1. When a 7zip file is uploaded as an attachment (e.g., in sys_attachment), we need to determine if it is encrypted.
2. If the file is not encrypted, it should be removed automatically.
3. This check needs to happen entirely from the backend (Server-side).

I’m looking for suggestions on:
✅ How to detect encryption in a 7zip file from ServiceNow’s backend.
✅ Any possible use of Glide APIs, Script Includes, or other ServiceNow features.
✅ Whether ServiceNow has any built-in utilities for file parsing like it does for Excel (e.g., GlideExcelParser).

Has anyone implemented something similar or knows an approach to achieve this? Any help would be appreciated!

Thanks in advance! 

CC: @Ankur Bawiskar @Dr Atul G- LNG  @Ravi Gaurav @Pradeep Sharma @Chuck Tomasi@Brad Bowman

Thanks
Bhushan 

[Ankur Bawiskar · Accepted solution]

@bhushannerkar 

Nothing is present OOB to check if file is password-protected or encrypted.

You will have to use custom solution by using mid server and external jar files to determine this.

OR

may be some javascript library which can be used via UI script

If my response helped please mark it correct and close the thread so that it benefits future readers.

[Dr Atul G- LNG]

Hi @bhushannerkar I don't have background on this but let me add a fee more experts

@Sandeep Rajput  @Community Alums  @Mark Manders 

[Ankur Bawiskar · Accepted solution]

@bhushannerkar 

Nothing is present OOB to check if file is password-protected or encrypted.

You will have to use custom solution by using mid server and external jar files to determine this.

OR

may be some javascript library which can be used via UI script

If my response helped please mark it correct and close the thread so that it benefits future readers.

[bhushannerkar]

Hello Ankur,

Thanks for the information! Could you please share more details on how to implement this custom solution? Any recommended JAR files for the MID Server or JavaScript libraries for UI scripts would be really helpful.

[Ankur Bawiskar]

@bhushannerkar 

I had used this to generate a password protected zip so see if the same supports to detect if file is password protected or not

zip4j-2.11.2

If my response helped please mark it correct and close the thread so that it benefits future readers.